chlorine

A toxic, green, gaseous chemical element (symbol Cl) with an atomic number of 17.

When TCCA touches a small amount of water and doesn’t dissolve, “it can experience a chemical reaction, generating heat and causing the decomposition of the chemical, which in turn produces toxic chlorine gas and can produce explosive nitrogen trichloride,” a 2023 report by the CSB said.

A single atom of this element.

A chlorine-based bleach or disinfectant.

The mechanism involved in the explosive reaction between swimming pool chlorine (calcium hypochlorite) and brake fluid (polyethylene glycol), a possible improvised explosive mixture, has been studied by means of the gaseous products produced.

Chlorines are useful for disinfecting water and for housekeeping disinfectants.